In this study, the effects of employing aluminum additive particles in an unconsolidated adsorbent bed on the performance of an adsorption cooling system (ACS) are studied. A three-dimensional distributed-parameter model is developed to investigate whether there is an optimum additive volume fraction for different bed conditions of a finned flat-tube heat exchanger filled with silica gel SWS-1L. Moreover, a qualitative comparison between temporal water uptake patterns in the presence and absence of aluminum additive is made to study the adsorption dynamics. Considering identical diameters for adsorbent and additive particles, results show that 0.3 mm is the optimal particles diameter for the fixed fin depth of 20 mm, yet, different fin heights (3–20 mm) and additive volume fractions (0–25%). Furthermore, while increasing the additive volume fraction leads to a continuous increase and decrease in specific cooling power and coefficient of performance, respectively, it is revealed that the variations of average and volumetric cooling power (VCP) are non-monotonic depending on particle size and fin height. Consequently, for the beds with fin heights of 8 and 20 mm filled with optimal particle diameter, 15% and 20% are found as the optimum additive volume fractions in which the VCP based on a given adsorber heat exchanger total volume is maximized to 370.8 and 399.7 kW/m³, respectively.

在这项研究中，研究了在松散吸附床中使用铝添加剂颗粒对吸附冷却系统 (ACS) 性能的影响。建立了三维分布参数模型来研究填充硅胶 SWS-1L 的翅片扁平管换热器在不同床层条件下是否存在最佳添加剂体积分数。此外，对存在和不存在铝添加剂的时间吸水模式进行定性比较，以研究吸附动力学。考虑到吸附剂和添加剂颗粒的直径相同，结果表明，对于 20 毫米的固定翅片深度，0.3 毫米是最佳粒径，但翅片高度 (3-20 毫米) 和添加剂体积分数 (0-25%) 不同。此外，VCP ) 是非单调的，具体取决于颗粒大小和翅片高度。因此，对于填充有最佳粒径的翅片高度为 8 和 20 mm 的床，发现 15% 和 20% 作为最佳添加剂体积分数，其中基于给定吸附器换热器总体积的VCP最大化为 370.8 和分别为399.7 kW/m ³。